Method of preventing drill string overflow
Patent
·
OSTI ID:5866543
A method is described of preventing drilling fluid overflow when raising a drill string suspended within a well bore and removing drill pipe sections. The method consists of: connecting a tool joint in the drill string near the bottom end thereof, the tool joint including at least one shear plug sealingly attached for providing a drilling fluid flow passageway from the interior to the exterior of the tool joint when sheared; shearing the shear plug in the tool joint whereby drilling fluid contained in the drill string is drained therethrough when the drill string is raised; and then raising the drill string and removing drill pipe sections.
- Assignee:
- Faulkner Oil Field Services, Inc., Washington, OK
- Patent Number(s):
- US 4577702
- OSTI ID:
- 5866543
- Country of Publication:
- United States
- Language:
- English
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